01 -
Preheat oven to 175°C. Grease a 23 x 33 cm baking dish and set aside.
02 -
Arrange chopped pecans evenly on a baking sheet and toast for 5–8 minutes. Allow to cool for later topping.
03 -
In a large bowl, beat together cake mix, milk, melted butter, and eggs until smooth. Pour batter into the prepared baking dish.
04 -
Bake according to package instructions, or until a toothpick inserted in the center comes out clean.
05 -
Let the cake cool for 10 minutes. Using the handle of a wooden spoon, poke holes uniformly over the cake, making sure to reach the bottom.
06 -
Heat heavy cream in a small saucepan over medium heat until simmering. Remove from heat, add chocolate chips, and stir until smooth.
07 -
Pour ganache over the cake, filling all the holes. Evenly sprinkle 158 g mini marshmallows over the warm ganache.
08 -
Return cake to oven for 1–2 minutes, just until marshmallows are slightly melted. Watch carefully to avoid burning.
09 -
In a medium bowl, mix melted butter, cocoa powder, and heavy cream. Gradually add powdered sugar, beating until smooth and spreadable.
10 -
Spread icing evenly over the cooled cake.
11 -
Sprinkle the toasted pecans and remaining marshmallows on top of the iced cake. Optionally, place under broiler for 1–2 minutes to lightly toast marshmallows.